base setup for osx in place

engine/texture.cpp

@@ -0,0 +1,36 @@
+#include "pch.h"
+#include "texture.hpp"
+#include "image.hpp"
+
+bool Texture2D::create(int width, int height, GLint format, const uint8_t* data, GLint filter, GLint wrap)
+{
+    m_width = width;
+    m_height = height;
+    m_format = format;
+    glGenTextures(1, &m_tex);
+    bind();
+    glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap);
+    unbind();
+    return true;
+}
+bool Texture2D::create(const Image& img)
+{
+    static GLint formats[] = { GL_R, GL_RG, GL_RGB, GL_RGBA };
+    return create(img.width, img.height, formats[img.comp - 1], img.data());
+}
+bool Texture2D::load(std::string filename)
+{
+    Image img;
+    if (!img.load(filename))
+        return false;
+    return create(img);
+}
+void Texture2D::update(const uint8_t* data)
+{
+    bind();
+    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_width, m_height, m_format, GL_UNSIGNED_BYTE, data);
+}